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The conceptual architecture is based on three (3) main components; the Portal, the Catalog Node, and the Data Repository. 1)The Climate Model Portal is the users real-time interface to the system, manage requests, download data, receive user input and catalog browsing. 2)the Catalog Node is the heart of the system and concentrates on connecting partners, metadata, search and discovery and secure peer-to-peer connectivity. 3)the Data Repository will be based on advanced real-time access components, and will also use the Data Center IT infrastructure for long term storage and access NCDCNCEPGFDL …* Archives…Data Sources…. Collaborators: DOE (ESG), NASA, EPA, UCAR/NCAR, SDSC, RENCI & others NOAA Climate Services Portal National Climate Model Portal NCMP

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A NOMADS OSSE Capability Steps for the OSSE Capability: 1) Generate a "nature" atmosphere or ocean 2) Compute synthetic observations 3) Assimilate the synthetic observations 4) Assess the impact on the resulting analysis forecast, prediction or assessment. UW, Madison The NCDC NOMADS data sets, which include conventional and non-conventional observations, are archived and accessible through the NOMADS servers. for NWP OSSE develop and integrate a massive on-line data base with users so there is controlled access to data set selection, location, spatial extent, Variable, quality and time period. Climate OSSE needs a new process NOMADS NCMP

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Climate OSSE Climate OSSEs may not use the same NWP processes (decades of files for integration) New approaches need to be developed or leveraged. (OLRs etc.) Climate OSSEs can establish appropriate confidence in climate change scenarios. Perturbed Physics Ensembles (B. Wielicki, et al.,) and a climateprediction.net approach NCMP

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Demonstration web page showing the URL queries of the ensembles OPeNDAP GDS query constrained by time and location of Paris airport for precipation for each ensemble component.

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We loop the previous queries over all forecast times to 384-hrs and graph the result for the probabilities of precipitation for Paris out 16 days. Combinations of probabilities (temp / precip) can derive products: frost, freezing rain etc., NOMADSNOMADS Ensemble Probabilities on the fly (demo)

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NOMADS saves the minimum data necessary to regenerate model output products. Analysis files are in the models own coordinate system. Input files are constructed with computer and computational efficiency in mind, and sometimes not in standard coordinate systems. Programs to convert these files are available upon request: spectral to gaussian gaussian to lat/lon sigma to pressure Data Assimilation: GDAS SSI